Mathematics
Q&A for people studying math at any level and professionals in related fields
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Cross Validated
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Stack Overflow
Q&A for professional and enthusiast programmers
Photography
Q&A for professional, enthusiast and amateur photographers
Code Review
Q&A for peer programmer code reviews
Area 51
Q&A for proposing new sites in the Stack Exchange network
Mathematica
Q&A for users of Wolfram Mathematica
Psychology & Neuroscience
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry
Super User
Q&A for computer enthusiasts and power users
Home Improvement
Q&A for contractors and serious DIYers
Computational Science
Q&A for scientists using computers to solve scientific problems
Data Science
Q&A for Data science professionals, Machine Learning specialists, and those interested in learning more about the field
Computer Science
Q&A for students, researchers and practitioners of computer science
Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing
The Workplace
Q&A for members of the workforce navigating the professional setting
Academia
Q&A for academics and those enrolled in higher education
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems